#top{
	height: 185px;
	width: 780px;
	background-color: aliceblue;
	margin-bottom: 2px;
}
#top1{
	height: 150px;
	width: 780px;
	background: url(../img/banner.jpg)no-repeat;
}
#top2 li{
	list-style: none;
		float: left;
		width: 78px;
		line-height: 30px;
		text-align: center;
		text-decoration: underline ;
		background: url(../img/button1.jpg)no-repeat;
}
#top2 li:hover{
	position: relative;
	bottom: 1px;
	right: 1px;
	background: url(../img/button1_bg.jpg)no-repeat;
}